define "circularity saw" and "biab"

S99-glossary.pod

@@ -7,13 +7,14 @@ Synopsis 99: Glossary
 
     Elizabeth Mattijsen (liz@dijkmat.nl)
     Moritz Lenz
+    Larry Wall
 
 =head1 VERSION
 
     Created: 26 June 2013
 
-    Last Modified: 30 June 2013
-    Version: 3
+    Last Modified: 30 June 2014
+    Version: 4
 
 This document tries to define many of the terms used within the Perl 6
 community.  It does not have an Apocalypse or Exegesis predecessor.  It
@@ -129,6 +130,10 @@ L<http://irc.perl6.org> to see what has been logged for you.
 Spanish for "dancer", The Bailador module (L<https://github.com/tadzik/Bailador/>)
 is a port of Perl 5's Dancer web framework (L<http://perldancer.org/>).
 
+=head2 biab
+
+Back In A Bit.  Only L</afk> for a little while.
+
 =head2 blast
 
 "B<Bl>ock, B<A>lternatively B<St>atement". Several constructs in Perl 6 expect either a
@@ -171,9 +176,19 @@ Perl 5, Perl 6 and NQP.
 
 =head2 CAS
 
-atomic Compare And Swap.  Primitive for lock-free multi-threaded read/write
+An atomic Compare And Swap.  Primitive for lock-free multi-threaded read/write
 access.
 
+=head2 circularity saw
+
+A pun on "circular saw".  When bootstrapping a language in terms
+of itself, we must rely on circular definitions in various places.
+Obviously if we were really to use those circular definitions to
+implement our language, we'll just get stuck in an infinite regress.
+So instead we grab our trusty "circularity saw" to cut those circular
+definitions in a spot deep down, hopefully in a way that the breakage
+will be very difficult for the end-user to notice in day-to-day use.
+
 =head2 circumfix
 
 =head2 class